You could use the "Shape" embedded dingbat font.Type R or r (one will be sharp corners and one will be rounded corners) and you will get a rectangle that you if you use the outline option to make a simple border and in the color of your choice. It is also your option to color the rectangle , add shadow or any of the options that are built into TLC for text. You cold look and see if any of the "images" might work for you.